'use strict';

var gulp = require('gulp');
var less = require('gulp-less');
var browserSync = require('browser-sync');
var nodemon = require('gulp-nodemon');
var config = require('./config');
// we'd need a slight delay to reload browsers
// connected to browser-sync after restarting nodemon
var BROWSER_SYNC_RELOAD_DELAY = 500;

gulp.task('nodemon', function (cb) {
    var called = false;
    return nodemon({
        // entry flie
        script: 'app.js',
        // watch core server file(s) that require server restart on change
        watch: ['app.js', 'action/*.js', 'api/*.js', 'config/*.js', 'controller/*.js', 'module/*.js']
    }).on('start', function onStart() {
        // ensure start only got called once
        if (!called) { cb(); }
        called = true;
    }).on('restart', function onRestart() {
        // reload connected browsers after a slight delay
        setTimeout(function reload() {
            browserSync.reload({
                stream: false
            });
        }, BROWSER_SYNC_RELOAD_DELAY);
    });
});

gulp.task('browser-sync', ['nodemon'], function () {
    // for more browser-sync config options: http://www.browsersync.io/docs/options/
    browserSync({
        // browser-sync proxy app address || 3000
        proxy: 'http://localhost:' + config.localPort + '',
        // browser Sync Port || 3006
        port: config.browserSyncPort,
        // google-chrome or safari?
        browser: ['google-chrome']
    });
});

gulp.task('js', function () {
    return gulp.src('static/**/*.js')
    // do stuff to JavaScript files
    //.pipe(uglify())
    //.pipe(gulp.dest('...'));
});

gulp.task('css', function () {
    return gulp.src('static/**/*.css')
        .pipe(browserSync.reload({ stream: true }));
})

gulp.task('less', function () {
    return gulp.src(['src/less/*.less'])//多个文件以数组形式传入
        .pipe(less())
        .pipe(gulp.dest('static/css'));
});

gulp.task('bs-reload', function () {
    browserSync.reload();
});

gulp.task('default', ['browser-sync'], function () {
    gulp.watch('static/**/*.js', ['js', 'bs-reload']);
    gulp.watch('static/**/*.css', ['css', 'bs-reload']);
    gulp.watch('src/less/*.less', ['less']);
    gulp.watch('src/view/*.html', ['bs-reload']);
});